feat: improve UX with vim.notify (#1763)

* fix(notify): don't report request on new line

* ref(notify): update message format

* ref(msgs): always quote values + decrease duplication

* fix(ci): undefined variables

* ref(actions): temporary silent actions.__index errors

* cleanup

* revert: panic effort, we continue to use error for those

Co-authored-by: Simon Hauser <Simon-Hauser@outlook.de>

lua/telescope/previewers/buffer_previewer.lua

@@ -948,7 +948,7 @@ previewers.highlights = defaulter(function(_)
             if v ~= "" then
               if v:sub(1, 1) == " " then
                 local part_of_old = v:match "%s+(.*)"
-                hl_groups[table.getn(hl_groups)] = hl_groups[table.getn(hl_groups)] .. part_of_old
+                hl_groups[#hl_groups] = hl_groups[#hl_groups] .. part_of_old
               else
                 table.insert(hl_groups, v)
               end